After thinking about the news that movies are going to be available for sale and rent on Facebook, I think there's a new battle brewing in the content distribution business. Sure this is just one announcement by one studio, but rest assured Facebook is seeking to identify and develop similar relationships with other movie studios and music labels. For Facebook, this is a natural fit, because so many of today's social interactions about pop culture are held on the social networking site. So, why not establish relationships with the content owners, and monetize those discussions. The relationship between Warner Brothers and Facebook does just that, it places movies in close proximity to the dialogue by Facebook's users about them. For example, a user can comment that they saw a movie and loved it; while another can disagree, but in-line with that discussion and available for all users can be a simple one-click option to purchase the content. Gone are the barriers of now heading to a brick & mortar location, or searching for the content on another site. This relationship provides for a simple integrated experience. Further, Facebook can foster those conversations and extend it's relationship with it's users while keeping them on the site longer. In a sense, with this news Facebook is reverse engineering the immensely popular iTunes store…where Apple is trying to build-out a social network with it's Ping offering, instead Facebook is bringing the content purchasing experience right into their site. In an age old chicken or the egg type of debate, we're left to wonder which will prove to be the winning strategy: first...